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execution 4STAND QUARTO TANDEM ROLLING MILL year of construction 1969/1984/2004 coil inside diameter 400 mm coil outside diameter mm speed 400 m/min. work rolls: D. 130 x 340 mm (driven) back up rolls: D. 390 x 335 mm motors: DC, converters ABB (installed 2004), 200 kW emulsion filtration: LAVAL PLC: ABB
The mill was driven by a 12 kW DC motor, through a fourspeed gearbox. The top surface speed of the rolls was 1100 mm/s. The surfaces of the 150 mm diameter, 203 mm long tool steel rolls were sandblasted, creating random roughness of R a = μm. Load cells, placed over the bearing blocks of the top roll, monitored the roll separating forces.
The arrangement of cluster mill is shown in Fig. (d). Type # 5. MultiHigh Rolling Mill: The multihigh rolling mill consists of two small diameter working rolls, a row of intermediate driving rolls, and a raw of backup rolls. This arrangement involves a cluster of either 12 or 20 rolls, resulting in exceptional rigidity of the whole roll ...
Figure 19: Trials (T15) of forged HSS work rolls in the first two stands of a 5stand cold rolling tandem mill (steel grades: H300LA and MBW 1500, HSS = forged High Speed Steel rolls, SSt (HV) = standard
Our latest developments of Forged Back Up Rolls offer higher performances than Cast Back Up Rolls. The structural homogeneity of these products enables an increase in hardness, as well as a high level of resistance, guaranteeing higher performances in the mill. Brochures and manuals: Sidenor Forgings and Castings Brochure (Englishspanish) ...
Tandem Mill Rolls. Five Stands Tandem Mill Rolling Line . Stand No. F1: F2: F3: F4: F5: Work Roll: 5% Cr Forged: 5% Cr Forged: 5% Cr Forged: 5% Cr Forged: 5% Cr Forged: Intermediate Roll: 3% Cr Forged: 3% Cr Forged: 3% Cr Forged: 3% Cr Forged: 3% Cr Forged: Back up Roll: 5% Cr Forged: 5% Cr Forged: 5% Cr Forged: 5% Cr Forged: 5% Cr Forged ...
Steel Steel Forming of steel: Forming processes convert solidified steel into products useful for the fabricating and construction industries. The objectives are to obtain a desired shape, to improve cast steel''s physical properties (which are not suitable for most applications), and to produce a surface suitable for a specific use.
Due to the reversing rolling passes, production efficiency is lower than that of a tandem mill. However, because the rolling parameters can be quickly changed for each coil, reversing cold mills are especially suitable for the smalllot production of various product types. The size of the mill equipment is also smaller, which allows easier ...
The problem with a small roll is a reduction of stiffness, which is overcome using backup rolls. These backup rolls are larger and contact the back side of the smaller rolls. A fourhigh mill has four rolls, two small and two large. A cluster mill has more than 4 rolls, usually in three tiers.
Apr 01, 2010· Each rolling stand of the mill is composed of a stack of rolls. For a 6high mill the rolls are named respectively work roll – WR ( the roll in contact with the material), backup roll – BUR (the biggest roll at the top controlled by an hydraulic cylinder) and the intermediate roll – IR, placed in the middle between the work and the backup roll (see Fig. 1).
Tandem mills – A tandem mill is a type of rolling mill where rolling is done in one pass. In a traditional rolling mill rolling is done in several passes, but in tandem mill there are several stands (>/=2 stands) and reductions take place successively. ... These back up rolls have a further set of backing rolls in the third tier. Sendzimir ...
Complete line projects include Coupled Pickling Tandem Cold Strip Mill (PLTCM) for POSCO Gwangyang Works and Bridle Steering Unit line for POSCO VST STS SPL. Equipment supplied includes Leveler Roll Assembly for Steel Dangjin Works, Back Up Roll Assembly at JFE Steel Chiba Works, and Pinch Roll Assembly at Dongkuk Steel Dangjin Works.
Tandem Roll Wire Drawing Rolling Mills These mills are capable of cold and hot rolling of difficulttodraw wires such as Ti and its alloy and special highcarbon steels. The rolls are of 2direction V and H and 3direction type, which are chosen according to materials, etc. of workpieces.
Tandem Mill Final Stand Roll : Less Roll Marks : FHAC : Special Material : CGL Skinpass Mill Work Roll : Spalling Resistance under CGL Condition : SFH20 : Special Material : Tandem Mill First Stand Roll Dull Finish Skinpass Roll : Dull Maintaining Wear Resistance : E61 : High Speed Steel : Hard Material Rolling Mill : Wear Resistance Abrasion ...
The mill stand can be work roll driven or back up roll driven. The mill can be designed with hydraulic work roll bending or back up roll bending. Installations typically have a single rolling mill stand, but may have two. Pinch rolls provide back tension for the pay off reel in the entry section and entry and exit tension for the temper pass.
Tandem Mill Back Up Roll Reversing Mill Back Up Roll : General Use : FB7 : 5%Cr Steel : Tandem Mill Back Up Roll Reversing Mill Back Up Roll : High Hardness Deep Hardness penetration : NBR : Special Material : Continuous Tandem Mill Back Up Roll : Fatigue Resistance Wear Control : NBX : Special Material : Hot Strip Mill Back Up Roll for High ...
Equipped with one of the best back up roll brands, Kaida Roll Group is one of competitive skin pass mill roll, temper mill roll, tandem mill roll manufacturers and suppliers in China, welcome to visit our website. Forged steel backup roll is mainly used in 4Hi mill and 6Hi mill. The diameter of roll .
Tandem mill installed in 1970. D stand delivery end of 44 tandem breakdown mill. Work rolls and backup rolls from 43, and 44 mills await dressing in a roll grinder. BettsBridgeford roll grinding lathe, installed in . Machinist Tom Shultz measures roll with a micrometer prior to grinding.
Tandem Mill Recommendations SiC/ Al2O3 Shellac, 80150 grit Work 1518 Aluminum Oxide, Resin, 2446 grit Backup 30100 Roll Finish (RA) Wheel Rx Note: "Ra", is the absolute distance from the mean line of the roughness profile within the evaluation length. There are .
May 02, 2017· Tandem rolling is also known as continuous rolling in which two or more set of four high rolling mill arranged in a series in which each set is called stand. These stands are arranged so they can roll the work piece in decreasing cross section. It is used for rolling thick work piece in single pass.
The main types of mills: backup roll of 650mm Mill, 900mm Mill, 1050mm Mill, 1250mm Mill, 1450mm Mill. BIEC BACKUP ROLLS ARE USED IN 4 HI and 6 HI REVERSING AND TANDEM MILLS FOR ALL PRODUCT ROLLING SUCH AS STEEL, STAINLESS, ALUMINUM,BRASS, COPPER UPTO SINGLE PC WEIGHING 32000 KGS
Most modern Tandem Cold Mill of five (5) stands with all 6high mill is provided. ... Work rolls, intermediate rolls and backup rolls can be changed while strip is in the mill. Work Rolls and Intermediate Rolls are to be changed by full automatic mode. Rolls of all stands can be changed simultaneously, when roll diameters are larger than ...
Tandem mill Sumitomo Metal, Industries Ltc. Apr 21, 1987 · In the tandem mill comprising a plurality of stands according to the present invention, a suitable mill taken from the group consisting of the common bendable roll fourhigh mill N, the sliding sleeve mill A, the intermediate backup roll shifting mill B, and the expandable sleeve mill C is selected and loed at each stand.
Abstract: According to the chatter phenomenon of 3 rd stand of a steelworks sixroller tandem cold mill (TCM), vertical vibration of tandem cold mill was simplified to eight degrees of asymmetric freedom massspring system. Virtual prototype model on vertical vibration of tandem cold mill was established and natural frequencies and main vibration mode of mill were solved by using automatic ...
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